2 acsch - inverse hyperbolic cosecant
9 eps nonzero real, defaults to epsilon()
14 Returns the acsch of x to a multiple of eps with error less in
15 absolute value than .75 * eps.
17 acsch(x) is the real number v for which csch(v) = x. It is given by
19 acsch(x) = ln((1 + sqrt(1 + x^2))/x)
23 ; print acsch(2, 1e-5), acsch(2, 1e-10), acsch(2, 1e-15), acsch(2, 1e-20)
24 .48121 .4812118251 .481211825059603 .4812118250596034475
30 NUMBER *qacsch(NUMBER *x, NUMBER *eps)
33 asinh, acosh, atanh, asech, acoth, epsilon
35 ## Copyright (C) 1999 Landon Curt Noll
37 ## Calc is open software; you can redistribute it and/or modify it under
38 ## the terms of the version 2.1 of the GNU Lesser General Public License
39 ## as published by the Free Software Foundation.
41 ## Calc is distributed in the hope that it will be useful, but WITHOUT
42 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
43 ## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
44 ## Public License for more details.
46 ## A copy of version 2.1 of the GNU Lesser General Public License is
47 ## distributed with calc under the filename COPYING-LGPL. You should have
48 ## received a copy with calc; if not, write to Free Software Foundation, Inc.
49 ## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
51 ## @(#) $Revision: 30.1 $
52 ## @(#) $Id: acsch,v 30.1 2007/03/16 11:10:42 chongo Exp $
53 ## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/acsch,v $
55 ## Under source code control: 1995/11/13 03:49:01
56 ## File existed as early as: 1995
58 ## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
59 ## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/